Smash protector for looms



w. w. ROBERTSON SMASH PROTECTOR FOR LOOMS Dec. 30, 1924.

Filed Jan. 1923 2 Sheets-Sheet 1 W. W. ROBERTSON sMAsH. PROTECTOR FOR LOOMS File d Jan. 1923 2 Sheets-Sheet 2 Patented Dec. 30, 1924.

1 UNITED STATES 1,521,253 PATENT, orrics.

WILLIAM ROBERTSON, 0F WORCESTER, MASSACHUSETTS, ASSIGNOR T0 CROMPTOCN & KNOWLES DOOM WORKS, OF \VORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. V

SMASH PROTECTOR FOR LOOIi'IS.

Application filed January 5, 1923. Serial No. 610,792.

To all whom; it may concern:

Be it known that 1, Human W. ROBERT- SON, a citizen of Canada, residing at VVorcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Smash Protector for Looms, of which the following is a specification.

This invention relates to a smash protecto particularly designed for use on certain types of carpet looms on which one lay end has a motion independent of the remaining portions of the lay.

Itis the general object of my invention to provide a construction in which the protector will be operative in every relative position of the lay and movable lay end.

In the preferred embodiment of my invention I provide a protecting device or dagger on the'main lay and a controlling device therefor mounted on the movable lay end, these parts co-operating to indicate presence or absence of the shuttle in the shuttle box on the movable lay end in every relative positionof the parts.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a side elevation of parts of a loom embodying my improvements;

Fig. 2 is a sectional plan view taken along the line 22 in Fig. 1; and

Figs. 3 and 4 are diagrammatic plan views, showing the relation of the parts when in different positions.

Referring to the. drawings, I have shown certain parts of a loom including a loom frame 10 supporting a rock shaft 11 on which are mounted lay swords 12 and a lay end support 13. The swords 12 support the usual lay 14: having a shuttle box 15 at one end thereof. Protecting devices 16 of the usual type are mounted on' a rock shaft 17 carried by the lay 14: and these devices are adapted to engage yielding stop plates 18 pivoted at 19 on the loom frame 10.

An arm 20, extends rearwardly from the plate 18 and a' very heavy coil spring 21 is connected between the free end of the arm 20 and a bracket 22 secured to the loo-m frame 10. When the protecting devices 16 engage the stop plates 18 at the opposite sides of the yield slightly as the lay is brought to rest,

thus reducing materially the shock which would be occasioned by striking a rigid stop.

A lay end 2 1 is mounted on the support 13 and is provided with a shuttle box preferably comprising a fixed front box plate member 25, a movable front box plate member 26, a fixed back box plate 27 and a pivoted binder 28. A protector finger 29 15 secured to a short shaft 30 pivotally mounted on the lay end 24 and having an arm 31 secured to the opposite end thereof. The arm 31 is provided with a roll 32 positioned to engage an arm 33 extending rearwardly from the shaft 17 on which the pro tecting devices 16 are mounted.

The upper engaging surface of the arm is preferably formed of an arc struck fro-m the axis of the shaft 11. A spring 10 causes the arm 33 to yioldingly engage the roll 32 and thereby maintains the finger 29 in contact with the binder 28. The spring 40 also acts to move the protecting device 16 into position to engage the stop plate 18 when both shuttle boxes are empty.

Having thus described my invention, it will be seen by reference to Figs. 3 and 4 that the roll 32 contacts with the upper curved surface of the arm 33 in every relative position of the lay l t and lay end 24, whether the parts are in the usual running relation shown in Fig. 3 or in the separated beat-up relation shown in Fig. 4. It will also be seen that the lay and lay end can move forward and rearward, either separately or together, without material change in the operative relation of these parts.

Having thus described my invention it will be seen that I have provided a very simple construction by which different parts of the protecting mechanism may be mounted upon relatively movable members while at the same time preserving a cooperative relation of the parts under all conditions.

It will be further evident that changes and modifications can be made in my invention by those skilled in the art and I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claim but what I claim is In a loom, a lay mounted to swing about a fixed pivot, a lay end mounted to swing with said lay about said fixed'piyot and also constructed to :be attimes positioned independently of said swinging lay, a protectm;.nandwmrearwai-dly projecting member on the 15, device on sa1 dlay, a shnttle' ind cating dendicating device in every relative position thereof, separate parallel rotatable isliafts0111;:

which said protecting device and said indibetWeen said shafts operative .in every rela- "end are moVingYoQether tionedgand relatively movable.

eating device are supported, and connections fiXedmyigT1at11TB5lconnections includingfa; rearyv'a- 'dly'j'proj ecting arni on the' protecton shaft onthe lay indicating-"I shat-t. 011 the lay end, said 7,. m hnsid lay and lay end are independently posind lay In testimony whereofI have hereunto afl so when: said 

